Blades ground for the kitchen staff (4)
I believe the answer is:
mace
'staff' is the definition.
(a mace is a ceremonial staff or stick)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for mace that I've seen before include "Disabling spray" , "Came to get nutmeg spice" , "Tear gas - spice" , "something fragrant" , "Medieval weapon or kind of spice" .)